Planetary gear transmission systems or components – Plural power paths to planetary gearing – Plural planetary units
Patent
1992-06-15
1994-05-31
Braun, Leslie A.
Planetary gear transmission systems or components
Plural power paths to planetary gearing
Plural planetary units
475116, 475127, F16H 366
Patent
active
053158989
ABSTRACT:
An automatic transmission has, between input and output shafts, a plurality of power transmitting paths composed of combinations of planetary gear trains, and a plurality of engaging units for selecting one of the power transmitting paths for establishing a desired gear position. An upshift is effected from a present gear position to a target gear position which is higher than the present gear position through disengagement of two engaging units and engagement of two other engaging units. A controlling intermediate gear position is selected which is higher than the target gear position and which can be shifted to from the present gear position and the target gear position only through disengagement of one of the engaging units and engagement of another of the engaging units. When an upshift command is issued, the transmission starts shifting from the present gear position to the controlling intermediate gear position. The rotating condition of the gear trains is detected after the shifting from the present gear position to the controlling intermediate gear position is started. When the detected rotating condition reaches a rotating condition which substantially corresponds to the target gear position, the transmission is shifted from the controlling intermediate gear position to the target gear position.
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patent: 5094130 (1992-03-01), Hirose et al.
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patent: 5125294 (1992-06-01), Takashi et al.
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English language of JP Abstract 62-137457.
Koyama Hideo
Takemasa Nobuo
Braun Leslie A.
Honda Giken Kogyo Kabushiki Kaisha
Massey Ryan W.
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